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传染性气溶通过建筑所排水系统的垂直传播:一项实验研究
Yuanyuan Niu1, Fang Wang2, Danting Luo1
1School of Energy and Environment, Southeast University, Nanjing, 210096, China.
Environmental pollution (Barking, Essex : 1987)
|January 1, 2024
概括
所排水系统可以传播SARS-CoV-2. 密封的排水道防止气溶的传播,但干燥的排水道由于负压力,对上层造成高感染风险.
科学领域:
- 环境工程 环境工程
- 公共卫生 公共卫生
- 传染病传播 传染病传播
背景情况:
- 随着COVID-19的爆发,人们越来越清楚地发现了通过建筑基础设施传播SARS-CoV-2的可能性.
- 所排水系统是建筑物内的空气传播病原体传播的可疑途径.
研究的目的:
- 通过所排水系统调查SARS-CoV-2的垂直传播.
- 评估地板排水完整性对气溶液病毒传播的影响.
主要方法:
- 在不同的排水条件下 (密封或干燥) 模拟含有光素的便被冲入所碗中.
- 空气采样和差压测量是在多层楼的地板排水地点进行的.
- 光素气溶作为潜在的垂直传输通过排水系统的追踪器.
主要成果:
- 密封的地板排水道防止化喷雾剂传播到其他地板,这表明感染风险明显降低.
- 干燥的地板下水道导致中性压力层 (NPL) 上方的乘客感染病毒的风险很高.
- 由于负压的增加,感染风险随着NPL以上的底部水平的上升而增加,而由于正压的增加,风险下降到NPL以下.
结论:
- 保持适当密封的地板排水管对于减轻通过所排水系统传播SARS-CoV-2至关重要.
- 干燥的排水道造成了显著的垂直传播风险,特别是在建筑物的上层.
- 了解排水系统中的压力动态是制定有效的防治空气传播病原体传播策略的关键.
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